Double-acting band-saw mill.



No. 640,458. Patented Jan. 2, |900. F. S. FARB.

DOUBLE ACTING BAND SAW MILL.

(Application filed May 31, 1898.) (W0 Model.) 8 Sheets-8hoet I.

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INU. 640,458. Patented Jan. 2, |900. F. S. FAHR.

'DOUBLE ACTING BAND SAW WHLL.

(Application led May 31, 1898.)

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INo. 6410,458. Patented lan. 2, |900. F. S. FARB.

nuBLE Alm BAND SAW MILL.

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No. @40,45% Patented Jan. 2, |900. F. S. FARB.

DUBLE ACTING BAND SAW WHLL.

(Application :Bled May 31, 1898.)

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No. www. Paten-ted san. 2,1900.

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DUUBLE ACTBNG BAND SAW WMU..

(Application filed may 31, 1898.)

No. M. Pat'ented lan. 2, |900.

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DOUBLE ACTING BAND SAW IIWAILLv (Application led May 31, 1898.) (NoModal.) 8 Shets-$heet 6.

Il" 'A' l No. 640,458. Patented lan. 2, |906. F. S. FARB.

DOUBLE ACTING BAND SAW WHLL.

(Application led May 31, 1898.)

8 Sheets-Sheet 7.

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No. 640,458. Patented lan. 2, |900. F. S. FARB.

DOUBLE ACTING BAND SAW MILL.

(Application filed May 31, 1898.) (N0 Windel.) 8 Sheets-Sheet 8.

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FREEMAN i5. FAHR, OF MINNFAPOLS, MINNESOTA, ASSIGNOR TO THE Flllllrlltili. ALLlS COMPANY, OF MHAVAUKEE, VISOONSIN.

lBOUBLlEHAC'l'ING BNUMSAW lllllLl...

SPEUlLFICATN forming part or" Letters Patent No. 640,458, dated January2, 1900.

Application tiled May 3l, 1898. Serial No. 682,136. (No model.)

To all zt'tom it may fo/tecra' broken awa 1. Fi. 5 is a verticalcross-sec- Be it known that l, FREEMAN S. FARB, a tion on the line e ofFig. t with the cantcitizen of the lUnited States, residing atMindelivering arms in their lowerinost or receivnea-polis, in the countyof Hennepin and State ing position. Fig. G is a View similar to Fig. 55

5 of Minnesota, have invented certain new and 5, but with thecant-delivering arms shown useful lmprovementsin Double-Actinglandinfull lines in their uppermost or normal po- Sawlllills; andl do herebydeclare the followsition and in dotted lines in their delivering ing tobe a full, clear, and exact description position. Fig. 7 is a sideelevation showing `of the invention, such as will enable others one ofthe saw-supporting wheels detached. 6o

io skilled in the art to which it appertains to Fig. 8 is an endelevation of the same with malte and use the same. some parts brokenaway. Fig. .il is a View lily invention relates to sawmills. similar toFig. S, but showing the periphery he invention was especially designedfor of the Wheel as it appears after removal of use in a band-saw millhaving a two-edged the marginal sections. Fig. l is a detail in 65 i sawand organized to cut in both directions elevation showing sector-gearfor the cantof the carriages travel. For brevity such a delivery shaftdetached. Fig. 1l is a similaimill may be called a two-way 7 ordoublevieT showing one of the cant-delivering arms acting band-sawmill.Suchadonble-acting detached. Figs. l2 and 13 are detail views band-sawmill, as compared with a one-Way in side and end elevation,respectively, show- 7o zo or single-acting mill, presents certainspecial ing one of the cut-oit` sectors of the log-loader problems ordiflienlties in respect to the sup-` detached. Fig. 14E is a detail inside elevaply of the logs, the removal of the cant, and tion showing oneof the log-loading arms dethe disposal of the slabs and lumber, whichtached; and Fig. 15 is a sectional elevation special diiiiculties havehitherto proven of with some parts broken away,illustrating the 75 z5'such a serious nature that, so far as l am special form of engine or{luid-pressure nioaware, no sawmill ot that type has been put tor whichis used for operating the loader and into successful operation. thecant-delivering device.

lily invention has for its especial object to The two-edged band-sawaissupported and overcome the above-noted diiliculties, with a operated bysuitable wheels ai, which are 8o 3o view of securing the success of thedoublemounted in respect to each other and the acting ortwoivay sawmill.Some of the feamill-'frame a2 in the ordinary or any suitable 'tures ofthe invention, however, may be caway. The supporting-wheels ct are ofthe orpable of use in other forms of sawmills. dinary construction, withthe exception that llo the ends-above noted my invention conprovision ismade for reducing the length of 85 sists of the novel devices andcombinations the peripheries thereof in order to compenof devices whichare hereinafter described, sate for the filing away of the saw. The anddelined in the claims. means shown for this purpose are marginal lilyinvention is :illustrated in the accom1 sections as, secured to the bodyportion a4 of panying drawings, wherein like notations the wheetrim bymaehine-screws a5 or other 9o to refer to like parts throughout theseveral suitable means, which will permit the said viewsmarginalsections to be removed at will. The

Figure l is a plan view of the receiving or construction of the wheel,however, is made log-supplying end of the mill with some parts thesubject-1natterof a divisional application removed and others brokenaway. Fig. 2 is filed in my name on the 27th day of April, 95

a vertical cross-section on the line foto of Fig. 1899, Serial No.Fill-,741, and hence is not l with the loading'arms in their raisedorlog claimed herein. retaining position. Fig. 3 is a view similarAttention will now be directed to the gento Fig. 2, but with theloading-arms in their eral features of the mill. lowered or ioadingposition. Fig. i is a plan The log-carriage h is of the usual or any roo5o view of the opposite or delivery end of the suitable form and ismounted to travel on a inill with some parts removed and others suitabletrack c, which extends in both dircction of the saw in both directionsof the carriages travel.

At the receiving end of the mill is located the log-deck f, which is ofthe usual or any suitable construction. At the opposite or delivery endof the mill is located a cant deck or receiver g. Between the track cand the said two decks-to wit, said log-deck fand said cant-deck g-islocated the live-roll way ci d', which is of such construction that theupper surfaces of the live-rolls d are below the levels of said decksand the log-carriage. The supporting-framework d for the liverolls CZhas attached to the track side, as shown,

suitable abutment or stop blocks d3 d4 for purposes which will presentlyappear'. These abutment or stop blocks d3 d4 are also shown as recessedor rabbeted to afford shouldered surfaces d5 on their inner edges. Theliverolls d are driven in the usual way by beveledgear drivingconnections, which are indicated at d in Figs. l and 4.

On the log-deckfis mounted in the usual or any suitable way a rock-shaftf. This rock-shaftf has fixed thereto cut-off sectors f2 of a specialform or shape for the most efficient action. Loadingarms (shown as madeup in two sections, each marked f3 and f4) are also fixed to saidrock-shaft f; but these loading-arms instead of being of the usual formare of a form adapted to overreach the live-rolls d for delivering thelogs l to the carriage b without interfering with the action of thelive-rolls. As shown, the outer sections f3 of the loading-arms are ofhook shape at their outer ends, and when the loadingarms are in theirlowered or delivering position, as shown in Fig. 3, their outer ends maystrike the shoulders d5 of the abutment or stop blocks d3. In virtueof'their shape and their relation to the rock-shaft f when in theirlowered position the said loading-arms will deliver ,the logs over thelive-roll way to the carriage while leaving sufficient clearanceunderneath the arms for the free movement of the lumber on thelive-rolls. The` outer sections f3 of the loadingarms are shown asremovably secured to the innersections f4. The inner sections f4 areenlarged and toothed on their faces and serve the function of theordinary retaining-arms for holding the logs in banking position whenthe logloader is in the position shown in Fig. 2. Otherwise stated, anordinary log-loader can be converted into one suitable for deliveringthe logs over the live-roll way to the carriage, as herein disclosed, bysimply adding to the ordinary retaining arms or sections f4 the outerend arms or sections f3. The rockshaft f of the log-loader also receivesmotion from a suitable upright engine or Huid-pressure motor in theordinary Way. As shown, one of the cut-off sectors f2 of the log-loaderis yconnected by a rod f5 to the piston-rod of an upright reciprocatingengine 5a.

The skid-timbers g of the cant-deck are shown as provided with endlesschains g', moving over the same, for conveying the cant 2 to any pointdesired, such as a gang-saw mill.

Directly under the cant-deck g in suitable bearings is mounted arock-shaft g2. To this rock-shaft are fixed the cant-deliverin g arms,which-are shown as made up of the two sections g3 and g4, bolted orotherwise rigidly secured together. To the rock-shaft g2 is also fixed asector-gear g5, which engages with a rack ge, fixed to the piston-rod ofa horizontal reciprocating engine 5b, as shown in Fig. 5. With theseconnections it is obvious that a rocking motion may be imparted to theshaft g2 and the cant-delivery arms g3 g4 at will. The saidcant-delivery arms g3 g4 are of the proper shape to overreach thelive-roll Way and rest at their outer ends in the recesses d5 of theabutment or stop blocks d4 when the said arms are in their lower-most orreceiving position, as shown in Fig. 5, while at the same timepreserving sufficient clearness underneath the said arms for the free`movement of the lumber 4 on the liverolls d. At the proper time thecant 2 is forced oft from the carriage b onto the cantdelivering arms g3g4 when in the position shown in Fig. 5, and under the action of theengine 5b the cant 2 will be delivered over the live-roll way onto thechains g of the deck g by bringing the parts into the position shown infull lines in Fig. 6.

Having regard to the general action, it must be obvious that by theimprovements above described the double or two-way action of the mill isrendered entirely feasible without incurring any extraordinary losseither in supplying the logs or in the disposal of the cuts. When thecarriage reaches the loading position at the head of the mill, oppositethe logdeck f, or at some time before its arrival in that position, theslab 3 or the board 4 is forced off from the carriage onto thelive-rolls d, and the log-loader is then thrown into action. At theopposite limit of the carriages travel the slab 3 or board 4 is disposedof in a similar manner onto the live-rolls d, and the cant-deliveringdevice is then thrown into action, thereby disposing of the cant. Withthis organization, therefore, there is no occasion for more than theordinary delay at either end of the carriages travel. The two- Way ordouble-acting mill is therefore rendered entirely practicable, therebyvery greatly increasing the capacity or output as compared with theordinary one-Way bandmill.

The two engines or fluid-pressure motors 5a and 5b are exactly alike andare of a special form designed by me to meet the requirements of thisand other similar work. The construction of these engines is illustratedin Fig. l5. Therein the numeral 6 represents the cylinder; 7, thepiston; S, the valve-seats; 9, the steam-chest; 10, the supply-pipe, and

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cadete l1 the exhaust-pipe. The valve-sections l2 are hollow andconnected by a hollow reduced stein lf3. The valve-sections l2 controlthe admission-ports p and the exhaustports p', and they also serve todivide the steam-chest 9 into end or exhaust sections and a central oradmission section. The valvesections l and their connecting-stein 'i3are made hollow to permit the passage therethrough of the exhaust fromthat end of the chest and cylinder opposite the single exhaust-pipe ll.ily the use of two exhaustpipes the said valve elements l2 and 13 mightbe made solid. The exhaust-portsp' tap the cylinder a sufcient distanceinward toward the center of the pistons travel to permit the piston p7to cover the said ports and close olf the exhaust before reaching theend of the stroke, as shown in Fig. l5. By this action some of the steamis caged between the piston and the end of the cylinder, and therebymade to act as a cushion to the piston. This of course avoids any jarwhich might otherwise occur to the parts operated by the engine. rllhevalves are of course controlled by hand. For this purpose they are shownas provided with hand-rods lit. As the valve is practically a balancedvalve, it is very easily operated by hand.

Although especially designed for the twoway or double-acting mill hereindescribed, it must be obvious that the log-loader and thecant-delivering device herein described might be employed in any form ofmill where it was desirable to secure the corresponding functions ofloading the logs over the liveroll way or delivering the cant over theliveroll way. Suppose,for exa1nple,that a mill was so designed that thelumber should go out at the same end as the logs are taken in. In suchcase the log-loader herein disclosed and the cant-delivering deviceherein disclosed would be needed. Their special purpose, however, andgreat value are in combination with each other and the other cooperatingelements to secure a successful two-way or double-acting band-saw mill.

lt should have been noted that with the organization herein disclosedthe cnigger or log-turner will be arranged to operate between the sideframes of the live-roll way, the passage for the same being' shown at nin Fig. l of the drawings.

The foregoing part of this specification and all of the claims heretoattached had been written and the drawings for the entire case had beencompleted and blue-prints thereof taken prior to April D, 1893. Sincethat date the working full-sized mill organized to include the mechanismherein disclosed has been completed and put into successful operation ina sawmill in Minneapolis, Minnesota, one of the largest mills in theworld. It is found in practice that this two-way or double-actingsawmill will saw three boards from corresponding logs while the circularnaw saws two boards. The old one-Way bandsaw mill sawed two boards whilethe circular saw sawed three boards. The two-way mill is also easier onthe machinery and easier on the men. It amounts to a revolution insawmill machinery.

'llhe live-roll way d d' herein disclosed is, of course, simply one formof lumber-conveyor. Any other form of conveyor capable of disposing ofthe lumber as cut and delivered from the carriage might, of course, besubstituted for the live-roll way as a mechanical equivalent thereof. Itwill also be understood that other details of the structure disclosedmight be changed without departing' from. the spirit of the invention.

lVhat I claim, and desire to secure by Letters Patent ofthe UnitedStates, is as follows:

l. ln a two-way or double-acting band-saw mill, the combination with acarriage and a track, of decks `for the logs and the cants on oppositesides of the saw, a lumber-conveyor for disposing of the lumber as cut,a logloader arranged to deliver the logs from the log-deck to thecarriage, without interfering with the action of said lumber-conveyor,and a cant-delivering device arranged to deliver the cant from thecarriage to the cant-deck, without interfering with the action of saidlumber-conveyor, substantially as described.

2. In a two-way or double-acting band-saw mill, the combination with acarriage and a track, of decks for the logs and the cants on oppositesides of the saw, a live-roll way extending between said track and saiddecks, a log-loader arranged to deliver the logs from said deck oversaid rollway to said car iage and a cant-delivering device arranged todeliver the cants from the carriage over said rollway to the cant-deck,all without interfering with the action of the live-rolls, substantiallyas described.

3. ln a sawmill, the combination with a carriage, track and log-deck, ofa lumber-conveyer between said track and said deck, and a log-loaderarranged to deliver the logs from said deck to said carriage, withoutinterfering with the action of said lumber-conveyor, substantially asdescribed.

el. ln a sawmill, the combination with a earriage and a track and alog-deck, of a live-roll way located between said track and said deck, alog-loader arranged to deliver the logs from said deck over saidlive-rolls to the carriage, without interfering with the action of saidrolls7 and a power device applied to operate said log-loader,substantially as described.

5. ln a sawmill, the combination with the carriage, the track and alog-deck, of a liveroll way between the track and the deck, and alog-loader comprising a rock-shaft with loading-arms adapted tooverreach the live-roll way for delivering the logs to the carriage,without interfering with the action of the rolls, substantially asdescribed.

(l. In a sawmill, the combination with the carriage, the track and alog-deck, of a liveu roll way between the track and the deck, a

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log-loader comprising a rock-shaft with loading-arms adapted tooverreach the live-roll way, and abutnients or stop-b1ocks on the trackside of said roll Way, against which said arms rest when in theiriowermost or loading position, substantially as described.

7. In a sawmill, the combination with a carriage, the track andlog-deck, of a live-roll way between said track and deck and a log-Ioader comprising a rock-shaft having the 0rdinary cut-01T sectors f2and retaining-arm sections f4, and provided also with loadingarms f3adapted to overreach the liveroll Way, abntments d3 Xed to the trackside of the rollway, and a hand-controlled engine applied to operatesaid log-loader, substantially as described.

8. In a sawmill, the combination with a carriage, track and a cant-deck, of a lumber-conveyer located between said track and said deck,and a cant-delivering device arranged to deliver the cant from saidcarriage to said deck, without interfering with the action of saidlumber-conveyer, substantially vas described.

9. In a sawmill, the combination with a carriage, track and cant-deck,of a live-roll way between said track and deck, and a cant-deliveringdevice comprising a rockshaft having a series of arms adapted tooverreach the live-roll way, Without interfering with the action of thesame, and a power device applied to operate said rock-shaft,substantially as described.

lO. In a sawmill, thc combination with a carriage, track and cant-deck,of a live-roll Way between said track and said deck, and acantdelivering device comprising a rock-shaft g2, a series ofdelivering-arms g3 g1 fixed to said shaft adapted to overreach thelive-roll Way, abutmentblocks d4 fixed to the track side of saidrollway, against which said arms rest when in receiving position, asector g5 fixed to said shaft, and an engine having a rack gG on itspiston-rod, engaging with said sector, all substantially as and for thepurpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

FREEMAN S. FARB.

Vitnesses:

JAS. F. WILLIAMSON, Bnssrn NELSON.

